Lee,
Lee Schermerhorn wrote:
Attempt to claify discussion of MPOL_DEFAULT.
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
These look like good changes.
One question: is this just improving the description, or has some behavior
changed in a recent kernel version, and the text is being adjusted for that
change?
Cheers,
Michael
man2/mbind.2 | 18 +++++++++++++-----
1 files changed, 13 insertions(+), 5 deletions(-)
Index: man-pages-3.05/man2/mbind.2
===================================================================
--- man-pages-3.05.orig/man2/mbind.2 2008-07-29 16:53:48.000000000 -0400
+++ man-pages-3.05/man2/mbind.2 2008-07-29 16:54:13.000000000 -0400
@@ -184,7 +184,8 @@ the memory policy reverts to
The
.B MPOL_DEFAULT
-mode specifies that the default policy should be used.
+mode requests that any non-default policy be removed,
+restoring default behavior.
When applied to a range of memory via
.BR mbind (),
this means to use the process policy,
@@ -193,7 +194,7 @@ which may have been set with
If the mode of the process policy is also
.BR MPOL_DEFAULT ,
the system-wide default policy will be used.
-The system-wide default policy will allocate
+The system-wide default policy allocates
pages on the node of the CPU that triggers the allocation.
For
.BR MPOL_DEFAULT ,
@@ -399,20 +400,27 @@ is ignored on huge page mappings.
The
.BR MPOL_DEFAULT ,
-mode has different effects for
+mode can have different effects for
.BR mbind ()
and
.BR set_mempolicy (2).
When
.B MPOL_DEFAULT
+is specified for
+.BR set_mempolicy (2),
+the process' policy reverts to system default policy
+or local allocation.
+When
+.B MPOL_DEFAULT
is specified for a range of memory using
.BR mbind (),
any pages subsequently allocated for that range will use
the process's policy, as set by
.BR set_mempolicy (2).
This effectively removes the explicit policy from the
-specified range.
-To select "local allocation" for a memory range,
+specified range, "falling back" to a possibly non-default
+policy.
+To select explicit "local allocation" for a memory range,
specify a
.I mode
of
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html
Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html
--
To unsubscribe from this list: send the line "unsubscribe linux-numa" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
